CN106894821B - It is a kind of originate, the monitoring method of received well and jacking construction - Google Patents
It is a kind of originate, the monitoring method of received well and jacking construction Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 243
- 238000010276 construction Methods 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- 238000006073 displacement reaction Methods 0.000 claims description 32
- 238000013461 design Methods 0.000 claims description 13
- 239000003673 groundwater Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 9
- 238000011010 flushing procedure Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
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- 239000000463 material Substances 0.000 claims description 7
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- 238000004458 analytical method Methods 0.000 claims description 6
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- 229910052738 indium Inorganic materials 0.000 claims description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 3
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
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Abstract
The invention discloses it is a kind of originate, the monitoring method of received well and jacking construction, comprising: (1) carry out preparation of construction at the scene；(2) it chooses monitoring point and monitoring instrument is set on the monitoring section of monitoring point；(3) monitoring frequency is formulated, information collection is carried out；(4) information data of acquisition is recorded, analyzed and is handled, obtain monitoring report；(5) monitoring Warning Index value is formulated；(6) according to the reasonability and science of monitoring report and monitoring Warning Index value assessment construction technology.It is of the invention on the basis of routine monitoring project, monitoring project is organically combined, the data of test mutually can be carried out check；It is continuously monitored in construction work, it is ensured that the continuity of data；Layout of the monitoring points, save the cost are reduced using system behavio(u)r；In conjunction with the practical determining test method of construction, the type of monitoring element, the installation position for adjusting monitoring point, the influence to construction quality is reduced.
Description
Technical field
The present invention relates to civil engineering monitoring method, it is specially a kind of originate, the monitoring method of received well and jacking construction.
Background technique
With the development of Chinese national economy, to infrastructure, especially the demand of means of transportation is being continuously increased, and
The land communications such as railway, highway are even more to stand in the breach；Meanwhile the high-grade main line of communication has also obtained unprecedented development,
Such as: high speed, heavy haul railway and highway are the Main way of the land communications such as railway, highway development respectively, and city
The important means for building and be mitigation urban transportation of iron, vcehicular tunnel.The perfect and capacity expansion revamping of means of transportation, vehicle speed-raising
And the development of highway network inevitably results in the neighboring tunnelings engineerings such as the newly built tunnels of neighbouring existing buildings and emerges in multitude,
This certainly will have an impact the safety of neighbouring existing structure object.Current City Road constructing tunnel pass through in encounter it is existing neighbouring
Works has superstructure, underground utilities and some special structures such as civil air defense constructions and installations, subway station etc., and these works pair
Excavation is more sensitive, and crossing construction influences greatly, vulnerable to disturbance.If not taking special countermeasure, the construction of newly built tunnels will
Have an adverse effect to existing structure object, such as the decline of works bearing capacity, even destroys；Deform excessive so that intrusion is net
It is empty；Differential settlement causes periphery buildings or structures damaged or is unable to normal use etc..
Adjacent to existing buildings and the rock tunnel on the mountain ridge passed through for periphery, neighboring tunneling is influenced except considering to excavate
Outside, vibration when also taking into account blast working influences, and domestic and international such proximity engineering largely occurs.Due to construction complexity
Be short in understanding and pay attention to not enough, such issues that caused engineering accident also happen occasionally, when building two wires such as certain single-track railway increasing, newly
Built tunnel adjoins existing tunnel construction, since explosion dosage is too big, causes the existing tunnel structure deteriorated originally aggravation
Deterioration；Certain vcehicular tunnel is designed without and is taken some countermeasures since pretesting is inadequate by goaf, causes lining cutting after construction
Cracking etc..For this purpose, carrying out construction monitoring adjacent to existing buildings to periphery becomes the essential important process of safe construction.
Summary of the invention
The purpose of the invention is to provide a kind of science, the originating of system, the monitoring method of received well and jacking construction,
Realize that in starting well, received well and push pipe in construction, monitoring is to existing building and the circumferentially influence of quality shape, and benefit
Security evaluation analysis is carried out with monitoring data, unit in charge of construction adjusts arrangement and method for construction and progress according to assessment result in time, guarantees to apply
Work go on smoothly and safety assurance.
The present invention is achieved through the following technical solutions: it is a kind of originate, the monitoring method of received well and jacking construction, utilize prison
Survey technology is monitored the disturbance situation for originating, generating during received well and jacking construction, comprising the following steps:
(1) preparation of construction is carried out at the scene, the exploration including engineering geology and hydrogeology；
(2) choose monitoring point and monitoring instrument be set on the monitoring section of monitoring point, monitoring point include: benchmark,
Convergence monitoring point in settlement monitoring point, horizontal displacement monitoring point, axle power monitoring point, water table measure point and push pipe；
(3) monitoring frequency is formulated, information collection is carried out to each monitoring point according to the time of monitoring frequency；
(4) information data of acquisition is recorded, analyzed and is handled, obtain monitoring report；
(5) monitoring Warning Index value is formulated, the data and monitoring Warning Index value comparison of report will be monitored；
(6) standard for reaching monitoring Warning Index value, then continue to construct；If not reaching the mark of monitoring Warning Index value
Standard then assesses the reasonability and science of construction technology, adjusts arrangement and method for construction.
Site operation preparation is carried out first, according to prospecting exposure and in-situ test and laboratory test achievement, according to physical force
Property index and origin cause of formation epoch are learned, and combine advanced exploration data, foundation soil is divided into several engineering geology layers, several engineering geology
Sub-layer, and hydrogeologic condition is reconnoitred, corresponding monitoring scheme and monitoring point are formulated according to the geological condition of prospecting
Selection, select corresponding detecting instrument to carry out periodic monitoring according to the monitoring frequency of formulation to detection site, and by monitoring
Information is handled with computer, is compared with preset monitoring Warning Index value, thus come judge construct periphery monitoring point
The case where whether meet continue construction requirement, continue to construct if reaching requirement, if not reaching requirement assesses construction work
The reasonability and science of skill adjust arrangement and method for construction, under the premise of improveing arrangement and method for construction and ensuring not influence engineering safety, then
Continue to construct.
Measuring point is laid at the scene according to monitoring scheme, is arranged in principle with the requirement in monitoring scheme.Reality is according to scene
Situation can close to design point position be arranged measuring point, but using can reach monitoring purpose as principle, the quantity of the type of monitoring point
The combined factors such as incorporation engineering feature, construction characteristic, monitoring expense consider that the point layout set for verifying design data is being set
Count most unfavorable combination and section；At first construction part of the point layout set for guiding construction under identical operating condition, purpose
It is to timely feedback information, to modify design and guidance construction, the position of earth's surface deformation measuring point should consider to reflect object
Deformation behaviour will also be conducive to the protection of measuring point, measuring point is once broken in the construction process again convenient for being observed using instrument
It is bad, measuring point in situ or as close as possible to origin-location benefit is set as early as possible, to guarantee the continuity of measuring point observation data.
The benchmark that works is embedded to use the common level mark of concrete, and markstone is embedded in 1.5~2.0 meters of left sides of earth's surface or less
Right depth, lays 2-3 working base points, and base position is in order to observed object and in stable or opposite settling position
Preferably, 3 times of foundation pit depths be should be greater than away from tunnel axis distance；Or it chooses on periphery and is squeezed at the structures such as stable bridge pier base
Reinforcing bar or bolt.
Further, the settlement monitoring point chosen in the step (2) includes: surface subsidence monitoring point, push pipe inner top
And bottom settlement monitoring point, periphery pipeline settlement monitoring point, Building's Subsidence Survey point.
Further, the horizontal displacement monitoring point in the step (2) includes: the monitoring of building enclosure horizontal deflection on the top of wall
Point, building enclosure deeply mixing cement-soil pile monitoring point, horizontal displacement monitoring point in push pipe.
Further, the axle power monitoring point in the step (2) includes: bracing members axle power monitoring point, concrete axial force of the supports prison
Measuring point.
Further, the detecting instrument in the step (2) includes:
Total station, inclinometer: the monitoring for horizontal displacement；
Water-level gauge, water level test tube: the monitoring for level of ground water；
Axle power meter, Reinforcement Stress-count: the monitoring for axle power；
Electronic level, indium steel ruler: for settling the monitoring of situation；
Electronics convergence gauge: for convergent monitoring in push pipe.
Further, in the step (3) the step of water table measure information collection are as follows:
(3.1) measuring point is embedded
A, pore-forming: water-level observation hole is crept into using clear water, and drilling stops boring after reaching projected depth, in time that drilling cleaning is dry
Only, it checks the unobstructed situation of drilling, and carries out cleaning record.
B, well casing is processed: the pvc pipe that the raw material of well casing are internal diameter Φ 70, pipe thickness is 2.5mm；To guarantee pvc pipe
Water penetration, process the through-hole of honeycomb Φ 8 within the scope of 0~4m of pvc pipe lower end, the circumferential spacing in hole is 12mm, between axial direction
Away from for 12mm, and packet geotextiles strainer.
C, well casing is placed: after pore-forming, hanging PVC well casing, it is ensured that have filter opening end downward；Answer above ground level in water-level observation hole
0.5m is arranged fixed measuring point mark in aperture, and is protected with protective case；
D, it backfills gravel material: after well casing hangs in hole in observation of groundwater levels hole, it is little partial size should to be filled out in the periphery of well casing immediately
In the meter Shi of 5mm；
E, well-flushing: after down tube, backfill gravel material, well-flushing should be carried out using clear water in time, and carries out well-flushing record.
(3.2) monitoring method
Observation of groundwater levels equipment use electric tape ga instrument, accuracy of observation 0.5cm, when gauge head touches underground water,
Alarm issues alarm signal, reads the scale label connecting with gauge head at this time, this reading is that water level is vertical with fixed measurement
Distance, then the depth to water and water level stake counted from ground are converted by the absolute altitude of fixed measuring point and with the relative position on ground
It is high.
(3.3) data analysis and processing.
Further, data handling utility computer carries out numbered analog simulation analysis in the step (4).Informationization is applied
Work requires to evaluate construction method with monitoring result, determines project slash.It therefore, will basis to the monitoring result of each measuring point
The safe condition of the comprehensive descisions structure and building such as management standard and rate of displacement (mm/d).For the matter for ensuring monitoring result
Amount, reinforce information feedback speed, whole monitoring data and chart by computer management, and to resident supervising engineer, design
Monitoring weekly or monthly magazine are submitted by unit and monitoring center.Monitoring report content include:
1) foundation for adjusting and arranging usually as construction when daily sheet, content includes title, the data of test, inscription etc.
Part forms.Wherein title should indicate monitoring content, monitoring date, report number.Test data includes that measuring point numbers, is initial
Value, this test value tested incremental value and accumulative variable quantity compared with last time.Inscription should indicate that monitoring unit, tester, fill in a form people
Member etc..
2) weekly return is same as above mainly in combination with engineering regular meeting, interim trifle content.
3) moon sheet is mainly included into engineering monitoring final report.
The object of monitoring measurement report submitting is limited in time:
1) (17:00 every afternoon divides electronic document transmission Party A) interior when 12 is small after measuring on the day of when daily sheet is sent and applies
Work floor manager portion.
2) weekly return is delivered newspaper floor manager portion and on-site supervision engineer in last day at weekend.
3) moon sheet reported and submitted supervising engineer before the end of month 30.
Further, the content of monitoring report includes: sedimentation deformation versus time curve, water in the step (4)
Prosposition moves versus time curve, axle power versus time curve figure, water level versus time curve and convergency value
Versus time curve.
Further, it is to ensure monitoring object that the monitoring Warning Index value in the step (5), which is before monitoring is implemented,
It is safe and each monitoring index of setting to estimate maximum value.In monitoring process,
When measured value < 0.85* estimates maximum value, safety；
When measured value=(0.85~1.0) * estimates maximum value, pay attention to；
It is dangerous when measured value > 1.0* estimates maximum value；
(0.85* design value be critical value) monitoring department should in report highlight indication, alarmed.
Compared with prior art, the present invention having the advantage that and having the beneficial effect that
(1) of the invention on the basis of routine monitoring project, emphasis monitors axle power, level of ground water, convergence, top in push pipe
The monitoring information of pipe inner top and bottom settlement monitoring point, and monitoring project is organically combined, effective space-time is formed, is tested
Data mutually can be carried out check；
(2) present invention continuously monitors in construction work, it is ensured that the continuity of data；It is reduced and is supervised using system behavio(u)r
Measuring point is laid, save the cost；
(3) present invention combines construction is practical to determine test method, the type of monitoring element, the safeguard measure of monitoring point, adjusts
The installation position of whole monitoring point reduces the influence to construction quality to the greatest extent；
(4) quantity of monitoring point of the present invention, under the premise of ensuring comprehensive, safety, rationally using being contacted between monitoring point,
Measuring point quantity is reduced, working efficiency is improved, reduces cost；
(5) determination of present invention monitoring warning value has engineering construction feasibility, under the premise of meeting safety, it is contemplated that
It improves construction efficiency and reduces operating expenses.
Detailed description of the invention
Fig. 1 is construction flow chart of the invention.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, embodiments of the present invention are not limited thereto,
Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and customary means, various replace is made
It changes and changes, should all be included within the scope of the invention.
Embodiment:
The present embodiment is accelerated construction progress to simplify working procedure, guarantees architecture quality, saves engineering cost, if
Count out be suitble to originate, received well and jacking construction, Optimizing construction process improves working efficiency, reduces material consumption, avoid
Energy waste, comply with standardized construction requirement it is a kind of originate, the monitoring method of received well and jacking construction, entire step
As shown in Figure 1:
The disturbance situation for originating, generating during received well and jacking construction is monitored using monitoring technology, including
Following steps:
(1) preparation of construction is carried out at the scene, the exploration including engineering geology and hydrogeology；
(2) choose monitoring point and monitoring instrument be set on the monitoring section of monitoring point, monitoring point include: benchmark,
Convergence monitoring point in settlement monitoring point, horizontal displacement monitoring point, axle power monitoring point, water table measure point and push pipe；
(3) monitoring frequency is formulated, information collection is carried out to each monitoring point according to the time of monitoring frequency；
(4) information data of acquisition is recorded, analyzed and is handled, obtain monitoring report；
(5) monitoring Warning Index value is formulated, the data and monitoring Warning Index value comparison of report will be monitored；
(6) standard for reaching monitoring Warning Index value, then continue to construct；If not reaching the mark of monitoring Warning Index value
Standard then assesses the reasonability and science of construction technology, adjusts arrangement and method for construction.
Site operation preparation is carried out first, according to prospecting exposure and in-situ test and laboratory test achievement, according to physical force
Property index and origin cause of formation epoch are learned, and combine advanced exploration data, foundation soil is divided into several engineering geology layers, several engineering geology
Sub-layer, and hydrogeologic condition is reconnoitred, corresponding monitoring scheme and monitoring point are formulated according to the geological condition of prospecting
Selection, select corresponding detecting instrument to carry out periodic monitoring according to the monitoring frequency of formulation to detection site, and by monitoring
Information is handled with computer, is compared with preset monitoring Warning Index value, thus come judge construct periphery monitoring point
The case where whether meet continue construction requirement, continue to construct if reaching requirement, if not reaching requirement assesses construction work
The reasonability and science of skill adjust arrangement and method for construction, under the premise of improveing arrangement and method for construction and ensuring not influence engineering safety, then
Continue to construct.
Measuring point is laid at the scene according to monitoring scheme, is arranged in principle with the requirement in monitoring scheme.Reality is according to scene
Situation can close to design point position be arranged measuring point, but using can reach monitoring purpose as principle, the quantity of the type of monitoring point
The combined factors such as incorporation engineering feature, construction characteristic, monitoring expense consider that the point layout set for verifying design data is being set
Count most unfavorable combination and section；At first construction part of the point layout set for guiding construction under identical operating condition, purpose
It is to timely feedback information, to modify design and guidance construction, the position of earth's surface deformation measuring point should consider to reflect object
Deformation behaviour will also be conducive to the protection of measuring point, measuring point is once broken in the construction process again convenient for being observed using instrument
It is bad, measuring point in situ or as close as possible to origin-location benefit is set as early as possible, to guarantee the continuity of measuring point observation data.
The benchmark that works is embedded to use the common level mark of concrete, and markstone is embedded in 1.5~2.0 meters of left sides of earth's surface or less
Right depth, lays 2-3 working base points, and base position is in order to observed object and in stable or opposite settling position
Preferably, 3 times of foundation pit depths be should be greater than away from tunnel axis distance；Or it chooses on periphery and is squeezed at the structures such as stable bridge pier base
Reinforcing bar or bolt.
Settlement monitoring point includes: surface subsidence monitoring point, push pipe inner top and bottom settlement monitoring point, periphery pipe settlement
Monitoring point, Building's Subsidence Survey point.
Push pipe inner top and the monitoring method and basic point repetition measurement method of bottom sedimentation are as follows: firstly, settlement monitoring is using accurate
Leveling measuring method, the technical requirements progress that Monitoring Datum Network waits vertical displacements monitoring control network by II, and cloth are set as attached
Conjunction or closed leveling line.Consolidating settlement monitoring point waits vertical displacements monitoring net technical requirements to carry out by II, and cloth is set as conforming to
Or closed leveling line.Control net measurement the key technical indexes is as shown in the following table 1, table 2, table 3.
The main technical requirements of 1 settlement monitoring of table control net
Note: n is survey station number.
The main technical requirements of 2 settlement monitoring of table
Note: n is survey station number.
3 level monitoring main technical requirements of table
Then, starting foundation of the datum mark as settlement monitoring, stability are particularly significant.Datum mark will aspire for stability can
It leans on, far from 3 times of deformed area distance, should all lay datum mark in pipe jacking tunnel.
Finally, tunnel vault settles one monitoring section of every 8 meters of layings within the scope of tunnel ceiling regions, measuring point is uniformly distributed
It is located at tunnel top and bottom position, monitoring instrument is all made of precise electronic level and is observed tunnel bottom sedimentation prison
Measuring point selects segment bolt or self-control settlement monitoring original part as monitoring point.
Horizontal displacement monitoring point includes: building enclosure horizontal deflection on the top of wall monitoring point, building enclosure deeply mixing cement-soil pile prison
Horizontal displacement monitoring point in measuring point, push pipe.
Horizontal displacement monitoring controls net and waits traverse surveys method using II, and horizontal displacement monitoring point uses minor angle method.Water
Flat monitoring point for displacement mean square error of coordinate is ± 3.0mm.
The main technical requirements of middle line horizontal displacement monitoring control net in 4 push pipe of table
Push pipe inner tunnel horizontal displacement basic point and settlement monitoring datum mark common point amount to 2-3 datum mark, tunnel Nei Shui
It is 8 meters of layings, one monitoring section (12 sections of meter) that prosposition, which moves layout of the monitoring points spacing, and one measuring point of every section is 12 total
Measuring point is observed using 1 second total station of high-precision.
The monitoring of building enclosure deeply mixing cement-soil pile uses 0610 type inclinometer of RST and mating PVC inclinometer pipe, monitoring essence
Degree can reach 0.01mm/0.5m.
Firstly, understanding horizontal displacement situation of the building enclosure at different depth in excavation of foundation pit and structure construction.In base
It cheats in digging process, as the soil body is largely removed inside foundation pit, under the action of outer lateral earth pressure, can generate and be similar to level and answer
Power, building enclosure will necessarily generate displacement.For this purpose, in Excavation Process it is necessary to fender post/wall along longitudinal direction
Horizontal displacement be monitored measurement, and timely feedback, to take specific aim measure, it is ensured that foundation pit, surrounding buildings or structures with
And the safety of underground utilities etc..
Monitoring is implemented:
1) measuring point is embedded
Building enclosure inclinometer pipe is embedded should to abide by following principle with installation:
A, it is tested in the inclinometer pipe being embedded in building enclosure using inclinometer.Measuring point be preferably selected in deformation it is big (or
It is dangerous) exemplary position.
B, tube bottom preferably maintains an equal level with steel reinforcement cage bottom or slightly below steel reinforcement cage bottom, top reach ground.
C, inclinometer pipe and the binding of the steel reinforcement cage of supporting construction are embedded, and binding spacing is not preferably greater than 1.5m.Inclinometer pipe and reinforcing bar
The fixation of cage must be sufficiently stable, and when to prevent casting concrete, inclinometer pipe mutually falls off with steel reinforcement cage.It must be noted that inclinometer pipe simultaneously
It is longitudinally twisted, the windup-degree of very little may be such that clinometer probe is blocked by guide groove.
It d, should dock good between the upper down tube of inclinometer pipe, seamless, joint is fixedly secured with self-tapping screw, with joint sealing glue
Sealing.
E, direction should be aligned when pipe removes bundle, make a pair of slot of surveying in pipe perpendicular to measuring surface (being parallel to direction of displacement).
F, bottom and top are sealed, the clean, unobstructed and straight of inclinometer pipe is kept.
G, clearly mark and reliable safeguard measure are carried out.
2) monitoring method
Deviational survey observation point is positive survey and it is anti-survey, when observation, which is first just being surveyed, (is labeled with one on the wheel frame of each inclinometer
Positive direction), then it is counter surveyed, usually every 0.5m, 1.0m reading is primary, and inclino-probe is put into inclinometer pipe bottom and should wait 5 minutes,
So as to pop one's head in adapt to manage in water temperature, when observation, should be noted that the leakproofness of instrument probe and cable, to prevent probe data transport part
Divide water inlet.
Every 0.5m, 1.0m label has to be stuck in same position when deviational survey observation, and reading has to waiting voltage value every time
Stabilization could be read, it is ensured that reading accuracy.
1., when deviational survey bottom of the tube be higher than excavation of foundation pit designed elevation position, wall (stake) body generate displacement when, can be used hole top
Method is pushed up toward bottom hole from hole and is corrected using wall (stake) body horizontal displacement as reference value.
2., when tested wall (stake) body is deformed, inclinometer pipe axis generate amount of deflection, determine inclinometer pipe axis with inclinometer
Each section of inclination angle can calculate the horizontal displacement of the soil body (pile body, wall).If datum mark is O point, coordinate is (X0, Y0), in
It is that the plane coordinates of each measuring point of inclinometer pipe axis is determined by following two formula:
I-measuring point serial number in formula, i=1,2 ... j；L-inclinometer gauge length or measuring point spacing (m)；
F-inclinometer calibration constant；
ΔεxiI-th section of-X-direction positive and negative survey reading strain difference half；
ΔεyiI-th section of-Y-direction positive and negative survey reading strain difference half；
To eliminate error caused by measuring equipment zero shift, each inclination angle for surveying section both direction should all carry out positive and negative two
Secondary measurement, i.e.,As Δ εxiOr Δ εyiWhen > 0, indicate to X-axis or Y-axis
Forward direction inclination, as Δ εxiOr Δ εyiWhen < 0, indicate negatively inclined to X-axis or Y-axis, it is each to calculate inclinometer pipe axis by above formula
Measuring point horizontal position, it is more different to survey time each measuring point horizontal coordinate, it can know the horizontal displacement of pile body.
3) data process&analysis
Displacement-duration curve should be drawn after measuring every time, hole depth -- displacement curve.When horizontal displacement-pattern is excessive suddenly
Increase is a kind of alarm signal, after receiving alarm signal, should carry out comprehensive analysis to various measurement informations immediately, judge in construction
There is any problem, and takes the countermeasure for guaranteeing construction safety in time.
4) safeguard measure
First when inclinometer pipe is buried, by Φ be 80mm long 1.5m steel pipe socket on the top of inclinometer pipe, to dig in the future
Protection when wall makees crown beam to inclinometer pipe, nozzle is with brick at inspection shaft, and above plus iron covering protects top of inclinometer pipe not to be destroyed.It surveys
Inclined tube nozzle is sealed with plastic lid to prevent sundries entrance.(bottom cover is pushed up up and down) between the upper down tube of inclinometer pipe carry out one with glass glue
It is secondary to be sealed, then be protected with the wrapping of two layers of plastic woven bag.Tube top carries out clearly protection mark.
Axle power monitoring point includes: bracing members axle power monitoring point, concrete axial force of the supports monitoring point.
Detecting instrument includes: total station, inclinometer: the monitoring for horizontal displacement；Water-level gauge, water level test tube: for ground
The monitoring of lower water level；Axle power meter, Reinforcement Stress-count: the monitoring for axle power；Electronic level, indium steel ruler: for settling situation
Monitoring；Electronics convergence gauge: for convergent monitoring in push pipe.Specifically used instrument is shown in Table 5,
The specifically used instrument of table 5
The step of water table measure information collection are as follows:
(3.1) measuring point is embedded
A, pore-forming: water-level observation hole is crept into using clear water, and drilling stops boring after reaching projected depth, in time that drilling cleaning is dry
Only, it checks the unobstructed situation of drilling, and carries out cleaning record.
B, well casing is processed: the pvc pipe that the raw material of well casing are internal diameter Φ 70, pipe thickness is 2.5mm；To guarantee pvc pipe
Water penetration, process the through-hole of honeycomb Φ 8 within the scope of 0~4m of pvc pipe lower end, the circumferential spacing in hole is 12mm, between axial direction
Away from for 12mm, and packet geotextiles strainer.
C, well casing is placed: after pore-forming, hanging PVC well casing, it is ensured that have filter opening end downward；Answer above ground level in water-level observation hole
0.5m is arranged fixed measuring point mark in aperture, and is protected with protective case；
D, it backfills gravel material: after well casing hangs in hole in observation of groundwater levels hole, it is little partial size should to be filled out in the periphery of well casing immediately
In the meter Shi of 5mm；
E, well-flushing: after down tube, backfill gravel material, well-flushing should be carried out using clear water in time, and carries out well-flushing record.
(3.2) monitoring method
Observation of groundwater levels equipment use electric tape ga instrument, accuracy of observation 0.5cm, when gauge head touches underground water,
Alarm issues alarm signal, reads the scale label connecting with gauge head at this time, this reading is that water level is vertical with fixed measurement
Distance, then the depth to water and water level stake counted from ground are converted by the absolute altitude of fixed measuring point and with the relative position on ground
It is high.
(3.3) data analysis and processing.
Further, data handling utility computer carries out numbered analog simulation analysis in the step (4).
Further, the content of monitoring report includes: sedimentation deformation versus time curve, water in the step (4)
Prosposition moves versus time curve, axle power versus time curve figure, water level versus time curve and convergency value
Versus time curve.
Monitoring Warning Index value is each monitoring index set before monitoring is implemented to ensure monitoring object safety
Estimate maximum value.In monitoring process,
When measured value < 0.85* estimates maximum value, safety；
When measured value=(0.85~1.0) * estimates maximum value, pay attention to；
It is dangerous when measured value > 1.0* estimates maximum value；
Wherein, (0.85* design value be critical value) monitoring department should in report highlight indication, alarmed.
The monitoring controlling value and third party monitoring data and construction monitoring number that monitoring and warning rank is proposed according to designing unit
After comparing relatively, the alert status of monitoring point in work progress is divided into level Four by severity is ascending, normal (green,
Level Four), yellow monitoring and warning (three-level), orange monitoring and warning (second level) and red monitoring and warning (level-one), as shown in table 6.
The Classification Index table of 6 monitoring and warning rank of table
Wherein, the monitoring works warning value of starting well, received well and push pipe is as shown in table 7, table 8, table 9,
7 starting well monitoring works warning value of table
8 received well monitoring works warning value of table
9 push pipe monitoring works warning value of table
| Serial number | Project | Alarming value | Day alarming value |
| 1 | Push pipe ground settlement | 15mm | ±3mm |
| 2 | Vault settlement measures in push pipe | 15mm | ±2-3mm |
| 3 | Encircle bottom settlement measurement in push pipe | 15mm | ±2-3mm |
| 4 | Horizontal displacement measures | 10mm | ±2mm |
| 5 | Horizontal convergence measures | 10mm | ±1mm |
What the present invention used originate, the monitoring method of received well and jacking construction, designed compared with routine monitoring method
Monitoring project organically combine, and form effective space-time, the data of test mutually can be carried out check；With, play system
Effect to foundation pit carry out comprehensive, stereoscopic monitoring, it is ensured that institute's measured data it is accurate, timely；It is continuously supervised in construction work
It surveys, it is ensured that the continuity of data, and layout of the monitoring points, save the cost are reduced using system behavio(u)r；It constructs using with design structure
Combine principle；Key parameter used in structure design is monitored, achievees the purpose that advanced optimize design；Crucial portion
Position is preferential, takes into account comprehensive principle；To region encryption measuring point number quite sensitive in fender body, support construction and project, carry out
Emphasis monitoring；In addition to key position preferentially lays measuring point, uniformly distributed monitoring point on the basis of systematic.Ensure comprehensively,
Under the premise of safety, rationally using being contacted between monitoring point, working efficiency is improved, cost is reduced.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is all according to
According to technical spirit any simple modification to the above embodiments of the invention, equivalent variations, protection of the invention is each fallen within
Within the scope of.
Claims (5)
1. it is a kind of originate, the monitoring method of received well and jacking construction, using monitoring technology to originate, received well and jacking construction
The disturbance situation generated in the process is monitored, it is characterised in that: the following steps are included:
(1) preparation of construction is carried out at the scene, the exploration including engineering geology and hydrogeology；
(2) it chooses monitoring point and monitoring instrument is set on the monitoring section of monitoring point, monitoring point includes: benchmark, sedimentation
Convergence monitoring point in monitoring point, horizontal displacement monitoring point, axle power monitoring point, water table measure point and push pipe；
(3) monitoring frequency is formulated, information collection is carried out to each monitoring point according to the time of monitoring frequency；
(4) information data of acquisition is recorded, analyzed and is handled, obtain monitoring report；
(5) monitoring Warning Index value is formulated, the data and monitoring Warning Index value comparison of report will be monitored；
(6) standard for reaching monitoring Warning Index value, then continue to construct；If not reaching the standard of monitoring Warning Index value,
The reasonability and science of construction technology are assessed, arrangement and method for construction is adjusted；
The settlement monitoring point chosen in the step (2) includes: surface subsidence monitoring point, push pipe inner top and bottom settlement monitoring
Point, periphery pipeline settlement monitoring point, Building's Subsidence Survey point；
Horizontal displacement monitoring point in the step (2) includes: building enclosure horizontal deflection on the top of wall monitoring point, building enclosure deep layer
Horizontal displacement monitoring point in horizontal displacement monitoring point, push pipe；
Axle power monitoring point in the step (2) includes: bracing members axle power monitoring point, concrete axial force of the supports monitoring point；
In the step (3) the step of water table measure information collection are as follows:
(3.1) measuring point is embedded
A, pore-forming: water-level observation hole is crept into using clear water, and drilling stops boring after reaching projected depth, in time cleans up drilling,
It checks the unobstructed situation of drilling, and carries out cleaning record；
B, well casing is processed: the pvc pipe that the raw material of well casing are internal diameter Φ 70, pipe thickness is 2.5mm；To guarantee the saturating of pvc pipe
It is aqueous, the through-hole of honeycomb Φ 8 is processed within the scope of 0~4m of pvc pipe lower end, the circumferential spacing in hole is 12mm, and axial spacing is
12mm, and packet geotextiles strainer；
C, well casing is placed: after pore-forming, hanging PVC well casing, it is ensured that have filter opening end downward；0.5m above ground level is answered in water-level observation hole,
Fixed measuring point mark is set in aperture, and is protected with protective case；
D, it backfills gravel material: after well casing hangs in hole in observation of groundwater levels hole, partial size should be filled out no more than 5mm in the periphery of well casing immediately
Meter Shi；
E, well-flushing: after down tube, backfill gravel material, well-flushing should be carried out using clear water in time, and carries out well-flushing record；
(3.2) level of ground water is observed
Observation of groundwater levels equipment uses electric tape ga instrument, and accuracy of observation 0.5cm alarms when gauge head touches underground water
Device issues alarm signal, reads the scale label connecting with gauge head at this time, this reading is the vertical range of water level and fixed measurement,
The depth to water and water level elevation counted from ground are converted by the absolute altitude of fixed measuring point and with the relative position on ground again；
(3.3) data that observation obtains are analyzed and is handled.
2. it is according to claim 1 it is a kind of originate, the monitoring method of received well and jacking construction, it is characterised in that: it is described
Detecting instrument in step (2) includes:
Total station, inclinometer: the monitoring for horizontal displacement；
Water-level gauge, water level test tube: the monitoring for level of ground water；
Axle power meter, Reinforcement Stress-count: the monitoring for axle power；
Electronic level, indium steel ruler: for settling the monitoring of situation；
Electronics convergence gauge: for convergent monitoring in push pipe.
3. it is according to claim 1 it is a kind of originate, the monitoring method of received well and jacking construction, it is characterised in that: it is described
Data handling utility computer carries out numbered analog simulation analysis in step (4).
4. it is according to claim 1 it is a kind of originate, the monitoring method of received well and jacking construction, it is characterised in that: it is described
The content of monitoring report includes: that sedimentation deformation versus time curve, horizontal displacement change with time song in step (4)
Line, axle power versus time curve figure, water level versus time curve and convergency value versus time curve.
5. it is according to claim 1 it is a kind of originate, the monitoring method of received well and jacking construction, it is characterised in that: it is described
Monitoring Warning Index value in step (5) is each monitoring index set before monitoring is implemented to ensure monitoring object safety
Estimate maximum value；In monitoring process,
When measured value < 0.85* estimates maximum value, safety；
When measured value=(0.85~1.0) * estimates maximum value, pay attention to；
It is dangerous when measured value > 1.0* estimates maximum value；
Wherein, 0.85* design value be critical value, monitoring department should in report highlight indication, alarmed.
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